Do US Citizens Living Abroad Have to Pay Taxes? 2027 Filing Guide

2027 US Tax Filing Requirements for Americans Abroad

Why the US Taxes Citizens Living Abroad

Under US tax law, citizens and resident aliens (green card holders) are taxed on their worldwide income no matter where they live.

This applies to wages, self-employment income, investment income, rental income, pensions, and alimony, whether the income was earned in the US or overseas.

The United States is one of only two countries that taxes based on citizenship rather than residency or where the income was earned. Most countries use a territorial or residence-based system, so an American who has lived abroad for decades, or who was born abroad and has never set foot in the US, can still have a US filing obligation.

You may also have a filing requirement even with no income of your own if you are married to someone who does, since your filing status affects the threshold that applies to you.

Who Has to File a US Tax Return From Abroad in 2027

The US tax filing requirements for Americans abroad use the same income thresholds as for taxpayers living in the US.

If your worldwide gross income for the 2026 tax year is at or above the amount for your filing status, you generally need to file a federal return in 2027, even if none of it was earned in the US.

Two details catch expats off guard.

First, a US expat married to a non-US spouse who does not file jointly is normally treated as Married Filing Separately, which carries a filing threshold of only $5.

Second, self-employed expats must file if their net self-employment earnings are $400 or more, regardless of the thresholds above, because that income also triggers self-employment tax.

FBAR and FATCA: Two Separate Reporting Requirements

Expats with foreign financial accounts often have two federal reporting obligations that are easy to confuse.

FBAR (FinCEN Form 114)

If you had a combined balance of more than $10,000 across all your foreign bank, investment, pension, or insurance accounts at any point during the year, you must file an FBAR with the US Treasury’s FinCEN, separate from your tax return.

Penalties for missing this filing can be steep even when no tax was owed, which is why the IRS offers catch-up relief for non-willful cases.

The FBAR covering 2026 is due April 15, 2027, with an automatic extension to October 15, 2027.

FATCA (Form 8938)

FATCA reporting is filed with your tax return itself, not separately, and the thresholds are higher and vary by filing status and whether you live in the US or abroad.

A single filer living abroad generally needs to report specified foreign assets once they exceed $200,000 at year end or $300,000 at any point in the year. Married couples filing jointly abroad report once assets exceed $400,000 at year end or $600,000 at any point in the year.

How Expats Avoid Double Taxation

US citizens abroad often worry about paying tax twice, once to their country of residence and again to the US. Double taxation is possible, but US law includes tools designed to reduce or eliminate it for most filers.

Foreign Earned Income Exclusion (FEIE)

The Foreign Earned Income Exclusion, claimed on Form 2555, lets qualifying expats exclude up to $132,900 of foreign earned income for the 2026 tax year, reported on the return you file in 2027.

To qualify, you must pass either the Physical Presence Test, generally 330 full days outside the US in a 12-month period, or the Bona Fide Residence Test. The FEIE only applies to earned income such as wages or self-employment income, not to interest, dividends, capital gains, or pensions, and it does not reduce self-employment tax.

Foreign Tax Credit (FTC)

The Foreign Tax Credit, claimed on Form 1116, offsets US tax dollar-for-dollar for income taxes you already paid to a foreign government.

Because you cannot claim the FTC on income already excluded by the FEIE, most expats compare both options and use whichever produces the better outcome, or combine them for income above the FEIE limit.

Taxes on Foreign Property, Rental Income and Investments

Rental income from foreign property is taxable by the US just like rental income from a US property, even if that income is also taxed where the property is located.

The Foreign Tax Credit for US expats can offset foreign income tax paid on that rental income. Investment income such as interest, dividends, and capital gains is also reportable, and the FEIE does not apply to it.

If you plan on selling your US home while living abroad, expect separate rules around the gain exclusion, depreciation recapture, and currency conversion.

Self-Employment Tax and Social Security While Living Abroad

Self-employed expats generally owe US self-employment tax of 15.3% on net earnings, reported on Schedule C and Schedule SE, even if the FEIE excludes that same income from federal income tax.

This surprises many freelancers and digital nomads who assume the FEIE covers everything.

Whether you pay into the US or a foreign social security system usually depends on whether your country of residence has a Social Security Totalization Agreement with the US. Where an agreement exists, you typically pay into only one system. Where none exists, you may owe US Social Security tax on foreign self-employment earnings regardless.

Child Tax Credit for Americans Abroad With Children

Expat parents can still claim the Child Tax Credit for US expats, worth up to $2,200 per qualifying child for the 2026 tax year.

Each child needs a valid Social Security number, and the credit phases out above $200,000 of modified adjusted gross income, or $400,000 for married couples filing jointly.

The refundable portion, the Additional Child Tax Credit, depends on earned income that stays on your return. If you claim the FEIE, you cannot claim the refundable portion at all.

Families with children often get a better result with the Foreign Tax Credit instead, so compare both methods before you file.

2027 Filing Deadlines for Americans Abroad

For the 2026 tax year, the standard federal filing deadline is April 15, 2027. Americans living abroad who meet the IRS requirements generally receive an automatic two-month extension to June 15, 2027.

If you need additional time, filing Form 4868 can extend the deadline to October 15, 2027. However, any taxes owed are still due by April 15, and interest generally begins accruing after that date.

Understanding the US expat tax deadlines is also important for other obligations, including FBAR filing and estimated tax payments.

What If You Have Not Been Filing? Catching Up Without Penalties

Many expats discover years later that they should have been filing all along, often after moving, opening a foreign account, or applying for a passport renewal.

For non-willful non-filers, the Streamlined Filing Compliance Procedures allow you to catch up on the last three years of tax returns and six years of FBARs without the penalties that normally apply to late filing.

Since the IRS ended the Delinquent FBAR Submission Procedures on July 1, 2026, the Streamlined procedures are now the main penalty-free path for expats who also missed FBARs.

Ignoring the issue carries real consequences: the IRS can flag unpaid tax debt above a set threshold and ask the State Department to deny or revoke a US passport until the debt is resolved.

Even If You Owe Nothing, You Still Have to File

Claiming the FEIE and FTC together can bring US tax liability to zero for many expats, but a zero balance does not remove the filing requirement itself.

The IRS requires an annual return from every citizen and resident alien who meets the income thresholds, whether or not any tax is actually due.

Skipping the return, even when you are confident you owe nothing, still risks penalties and interest if it turns out you owed more than expected.